Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high-precision instrument hardware engineered with an upgraded 1:18 gear ratio for smooth, accurate, and stable tuning. CNC-machined from premium materials, it features brass string posts fitted with exacting tolerances to maximize durability and tuning stability.
Equipped with an innovative stepped flanged washer, this tuning machine reliably centers the string post via the banjo bolt, eliminating tilting moment and excess pressure without requiring stepped peghead drilling. All closed housings are lubricated for life with specialized grease, guaranteeing completely maintenance-free performance.
Designed with the exact mounting dimensions of previous generation units, the M6 90 offers seamless retrofitting and replacement capabilities. Its self-locking drive mechanism and premium finish provide consistent resistance and dependable string tension holding power.
| Brand | Schaller |
| Series | M6 Series |
| Model | M6 90 |
| SKU | 10050570.01.55 |
| Gear Ratio | 1:18 |
| Product Weight | 0.13 lb |
| Weight with Button per Single Tuner (Small/Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including hollow screw |
| Button Bore Hole | Diameter 0.17 in (4.2 mm) with driving surface 0.14 in (3.6 mm) |
| String Post Material | Brass |
| Lubrication | Schaller special grease (permanently lubricated) |
